The Gap of Dunloe is a narrow mountain pass forged between the MacGillycuddy Reeks and Purple Mountain by glacial flows. The Gap is approximately 11 km from north to south. You can hire a jaunting car (horse and trap) to travel through the Gap and take a boat back to Killarney from Lord Brandon's cottage.
It makes a good day's exercise by bicycle. You can also travel the opposite direction by taking a boat ride from Ross Castle with your bike to Lord Brandon's Cottage and cycle back through the Gap to Kate Kearney's cottage.